I turn off only the skimmer and return for an hour(unless I forget to turn back on, then 6~12hrs). Leave the powerheads running, something I read a while back about this layer of water surrounding everything and the flow helps the food get past this layer to the coral, idk it was something to those lines. No feed at the Sametime as the fish about 6ish in the evening. Mix it all together and toss it in. You can feed at night, but I don't.